Tool for flaring tubes



1940- H. E. MAUPEN I zgz jig TOOL FOR FLAR'I'NG TUBES Filed A ril 29, 1959 INVENTOR. J%m E.Ma m;

' ATTORNEY Patented Nov. 12, 1940 UNITED v Henry- Edward- Maupin, Portsmouth, Ohio L a Applicanta a;19mm1a. 2103 81,?

The .present invention relates to tools ;which are used for flaring tube ends and lsanimprove- 1 ment over tools of this type. V r I v The principal object of thepresentinvention,

s to provide a tool for flaring tube ends'which is-economical to produce and which can vt e-readily used in close quarters. i v

Another important object of the present in- I vention is to-provide atom for flaring tube, ends; Q

toposition the tube end beingflared in orderthat they mayproduce a symmetrical flange upon' thetubeend. Another object of thepresent invention is to provide a tool for -fiaring .tubes which canbe readily operated by handTwithoutfusing' ad'dla .tional tools but yet which is sr'noot h,.;f orceful and regular in its operation. r r r t, Further objects of the invention will be in part 0 pointed outand in part obvious in'the. followa ingdetailed description based upon theZacconi -o panyingdrawing.

In thedrawing: Fig. 1 is a side elevation of the toolc'oniprising the, present invention.

Fig. 2 is atop cross sectional takenllpon lille' 22 of Fig. 1,

Fig. 3 is an end cross sectional'viewof the tool taken upon line[3,3 of'Fig. 1 andflhaving the tube to'be flared in position.

Fig. 4 is an end view Similar to Fig. 3 but'ShdW ing the position of themembers upon the flaringofthetubeend. s s Fig. 5 is an' end view' of the tube supporting view of the tool a members taken on line 5 5 'of Fig.2.

" Fig. dis a cross sectional view of the'o'ppo'site end of the tube supporting member taken on line 6'6 of Fig. 2, and r Fig. 7 is a top view of the tube supporting" members in-their partially open position? Referring now more particularly to the accoma panying drawingwherein likereference characters refer to similarrnembers, numeral l desig-;. nates a substantially, .U-shaped" blockgwhich. is formed by a pair of jaws 2 and 3 connected at} one of their ends ;.by.a base portion .4. .j Base por tion 4 has a threadedbor'e 5 formed through .a central portion thereof. I Rotatably 'I mounted within said bore'5 is a shaft 6 having threads '1. upon its periphery. which threads Tare in'thread- 1 edengagement with the threads "of bore 5;. The upper end of shaft .6 has a block 8-Qmounted thereon and in fixed connectiontherewith'. Said block 8 has'a horizontal opening9forn1e d there through in which is slidably mounted; a leverlq;

which members thereof automatically cooperate 1 Claims. (01115349) t 7 whereby said? lever. I0 canabe" caused to: extend atwill of user upon opposite sides ofblockt.

The opposite onlower end of shaftfjB has'a cone-shaped member l' l fixedly connected thereto. Said cone-shaped 'mexnber ll hasthe lower peripheral wall l2 thereoftap'ering inwardly at. a 45 angle relativetoth'e axisof shaftfG and. terminates, in a point [3 -which is in line w'lthv said axis.

- The pm bbrnn'er the new walls I 5' or '1 iaws'ffand' '3 extendsubstantlally parallel to the axisjof said shaft 6 whereasthe loweriinterior wall portions l6 thereof fiareinwardly towards one another at a 30? angle relatlve tos'aid'axl's of shaft 6 andar'e positionedan equali'distahce 15 upon each sideof said.axis. Said Jaws 2 'and,3 terminateat their lower end witha flatwall 11; A pair of equal width barsldand I'Qare each" pivotally connected by pins 20 to .alink 2|. Said bars I8 and. '19 each have a series of graduated 20 semi-cimular recesses 22iormed upon their opposed faces. in such a manner'that when said bars l8 andll}! are placed adjacentone another. a series of graduated bores23 are provided, with the axesthereof centered betweenwalls 25. "The 25 walls of said bores .23 taper outwardly at their" upper end to provide seats 24', which seats 24 taper at a 45"a'ngle relative to'the axes ofthe bores 23.v The" exterior Walls25 of bars [8 and l9taper from the upper face thereof inwardly '3 to'wards'thelower face 26 at a 30 angle relative to the axes ofbores 23; Said face 26 issubstan tially fiat and extends substantially at right an v gles to said axes of bores 23-. Bar l8 hasapin' 21 mounted therethroug h which extends from the 35 interior face; thereof for entcringa diametrical ly'oppose'd openingza formedthr qughbar l 9 and thereby retaining said bars l8 and Min a given position relative to one another'in order thatthe recesses 22 evenly meet with one anotherto pro'- '40 vide bores 23 and also top're's'entlower iaces 2B extending contiguous from oneanother. Inop'eration, leve'rflll is given-a ciicular'movement tor rotating shaft 6. -Upon'sha'ft6 being given a righthand rotation', cone shaped member I twin 45 be'raised towards base'portio'n 4. A'tube flfllis then positioned between bars 18 and IS in the pair of diametrically opposed rec'esses"22 which pro-. vide a'bore 23 ofthe'size' corresponding to the circumferencjdf the tube. Said bars "18 and- !9 50 2 and 3 of-block l 'withtapered walls 25 rr bars l8 and I9 supported by the correspondingly tapered interior wall l6 of jaws 2 and 3. Said walls 25 being tapered at a 30 angle relative to the axis of shaft 6 will also be positioned at the same angle relative to the axis of tube 40, since bores 23 and tube 40 will have a common axis which is in line with the axis of shaft 6 due to said wall l6 being flared at a 30 angle relative to the axis of bores 23 and walls 25 will therefore receive said walls 16 and position the axis of tube III in line with the axis of shaft 6 while,

at the same time, allowing bars 3 and I! to be.

longitudinally slidable.

Upon shaft 6 being given a lefthand rotation, the cone-shaped member II will be directed towards the bore 4| oftube 40: Upon the tapered walls l2 contacting the wall of bore ll, the cone-' shaped member II will gradually tend to evenly position itself within said bore ll and will therefore causevbars l8 and I! to longitudinallyslide upon interior walls IGuntil the point II! of coneshaped member is in perfect alinement with the axis of tube 40. Continued downward movement of cone-shaped member H causes the spreading of the upper edge of tube 40 due to the spinning motion and wedge-like action of said member ll. Bars l8 and I9, together with tube 40, will be forced downwardly between walls i6 and because of the downwardly tapering position of wall I6, bars l8 and l9will be forced towards one another with, an increasing amount of force as they are moved downwardly, thereby increasing the gripping action of the walls of the cavities 22- upon the periphery of tube 40 for preventing any possible movement thereof while under'the pressure exerted by member H.

Shaft is given a lefthand rotation until such time as cone-shaped member II has spread the tube 40 sufiiciently for the periphery thereof to contact seat 24, at which time the tube 4!! will have a flange 42 as shown in Fig. 4' of the drawing, which extends outwardly atan' angle relative to the axis of the tube equal to the angle of taper of wall l2 and seat 24.

Upon reversing the rotation of shaft 6, coneshaped member H is withdrawn from the tube 40 and block I is free to be removed from the tube supporting members, bars l8 and I9. Said bars-l8 and I9 can then be pivoted upon their pins away from one another for detaching the tube 40 from within the recesses 22. I

As can best be noted in Figs. ,3 and 4 of the drawing, the lower edges I! of jaws 2 and 3 form with the lower faces 26 of bars l8 and I! .a flat continuous surface around the tube end being flared and in this manner, the present tool can be used upon tube ends of which only a small portion of the tube extends beyond a surface or surrounding members and inasmuchas the operating member of thetool is at the opposite end of the tool from the'tube' being flared, the entire tool can be readily positioned among machinery and the like for performing its operation.

Whereas, it has hereinbefore been specifically mentioned that the tapered portion l2 and seats 24' are formed at a 45'? angle while the walls 25.]and interior walls l6 are formed at a angle, it is obvious that these specific notations of degree can be variedto obtain the same results. However, the angle of walls 25 and walls l6 relative to the axis of the tube and the shaft 6 should be smaller than the angle of taper of portion I2 and seat 24 inasmuch as tapered portion [2 should form a wider angle than the sum of the angles of the walls 25 to give a spreading effect to the tube 40, which should be counteracted by the walls 16 and 25.

The present invention as herein disclosed is capable of considerable modification and such changes from the device herein described and disclosed as come within the scope of the appended claims is deemed to bepart of the pres ent invention. 1

I claim:

1; An improvement in tools for flaring tubes comprising a pair of jaws, a base member joining an end portion of said jaws, said base memberhaving abore formed therethrough, a shaft movably mounted through said bore, a coneshaped member connected to said shaft, the op-' posite end portion of said jaws having their opposing faces flared downwardly toward one another and a tube supporting bar having the sides thereof tapered to fit between and be longitudinally slidably supported'by said opposing faces of the pair of jaws.

2; An improvement in tools for flaring tubes comprising a pair'of jaws, an end 'portionpf each of said jaws having the side thereof opposing said other jaw flared towards the similar sideof the other jaw, a base member joining the opposite end portion of said jaws to one another, said base member having a bore for-med therethrough, a shaft slidably mounted through said bore, a cone-shaped member connected to said shaft and having a wider; angle of taper than'the angle formed between said flared sides and a tube supporting bar having the sidw thereof tapered tovfit between and-be longitudi nally slidably supported by said flared sides.

3. An improvement in tools for flaring tubes comprising a pair of opposed jaws each havin a portion of the inner side thereof formed oblique, a base member joining said jaws with their oblique portions extending toward one another, said base member having a threaded bore formed therethrough, a threaded shaft rotatably mounted through said bore in threaded engagement therewith, a cone-shaped member carried by said shaft and having the point thereof in line with the axisof said shaft and a tube supporting bar longitudinally slidably supported by said oblique'portion of said jaws, and having the sides thereof each inclined at an angle relative to the axis of the tube supported thereby equal to the angle of inclination of the adjacent oblique portion relative to the axis of said shaft. 4. An improvement in toolsfor flaring tubes having a threaded bore formed therethrough,

a threaded shaft rotatably mounted throughsaid bore in threaded engagement therewith, a pair of diametrically opposed jaws, a portion of the opposing sides of said jaws having a downward inclination toward one another, said base member joiningsaid jaws with their inclined portions extending toward one another at a-given angle relative to the axis of said shaft, -a cone-.

lower portion of said jaws being inclined towards one another, a tube supporting bar longitudinally slidably supported by and" between the inclined portion of said jaws, and the lower face of said bar extending in line with the end face of the 5 lower portion of said jaw s. I

HENRY EDWARD MAUPIN. 

